Role of Water in Setting Reaction and Polyacrylic Acid vs Polymaleic Acid
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Questions and Answers

During the setting reaction of Glass Ionomer Cement, which phase occurs when the powder and liquid are mixed?

  • Ion leaching phase (correct)
  • Polycarboxylate phase
  • Silicate cement phase
  • Fluoride release phase
  • What is the purpose of adding tartaric acid to improve the manipulation of ASPA I?

  • To decrease working time
  • To extend working time (correct)
  • To accelerate setting time
  • To increase mechanical properties
  • Which component inhibits the ordering of the structure in the solution of polyacrylic acid when producing ASPA III?

  • Tartaric acid
  • Zinc oxide
  • Fluro-alumino-silicate particles
  • Methylalcohol (correct)
  • What makes the copolymer of acrylic acid and itaconic acid synthesized by Wilson and Crisp less regular than simple polyacrylic acid?

    <p>Formation of intermolecular hydrogen bonds</p> Signup and view all the answers

    Which phase occurs during the setting reaction of Glass Ionomer Cement when fluoride release is advantageous?

    <p>Ion leaching phase</p> Signup and view all the answers

    What is the primary reason that ASPA I is described as unworkable?

    <p>Slow setting time</p> Signup and view all the answers

    In Glass Ionomer Cement, what is the main role of fluoro-alumino-silicate particles combined with polyacrylic acid?

    <p>Provide fluoride release</p> Signup and view all the answers

    Why can polycarboxylate cement not be used as a restorative material according to the text?

    <p>High solubility</p> Signup and view all the answers

    What effect does adding methylalcohol have on the polyacrylic acid solution in producing ASPA III?

    <p>Inhibits ordering of structure</p> Signup and view all the answers

    Which component contributes to the inherent adhesion to tooth structure in polycarboxylate cement?

    <p>Polyacrylic acid</p> Signup and view all the answers

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